Leavenworth County remained the sixth most populous in Kansas, according to state figures the U.S. Census Bureau released today.

The bureau on Thursday started releasing population and demographic information for the state of Kansas from last year’s census. The release will include population figures for all counties, cities and other geographic divisions. Look here for more information as it becomes available.

The information thus far shows Leavenworth County grew from 68,691 residents in 2000 to 76,227 in 2010, a growth rate of 11 percent.

Forty-two of the state’s 105 counties added population in the last decade. As expected. many of those were clustered near the Kansas City metropolitan area or Wichita. The census confirmed Johnson County now is the most populous county with 544,179 residents, up 93,093 or 20.6 percent since 2000. Wyandotte County was the only Kansas-side metro county to lose population, if barely. Its 2010 population is 157,505 or 377 fewer than 2000.

Despite being overtaken by Johnson County, Sedgwick County grew by 10 percent with 498,000 residents.

The city of Leavenworth, the only county city with data immediately available, went from 35,420 residents in the 2000 census to 35,251 in 2010.